Abstract:
:Morphological changes in human myocardium associated with pressure overload-induced left ventricular hypertrophy were studied in 22 normal and 21 hypertrophic hearts obtained at autopsy. Samples were obtained from the left lateral ventricular wall, half way between the apex and the base. Myocyte dimensions, polyploidization, multinucleation and relative volume fractions were studied. Regression analysis in relation to indexed heart weight yielded statistically significant correlation coefficients for myocyte volume: r = 0.69 (P less than 0.001), for degree of polyploidization: r = 0.77 (P less than 0.001), for number of nuclei per myocyte: r = 0.47 (P less than 0.01) and for volume fraction of myocytes: r = 0.32 (P less than 0.05). Approximate numbers of myocytes and connective tissue cells per left ventricle were calculated. Correlation coefficients related to indexed heart weight were r = 0.34 (P less than 0.05) for the number of myocytes and r = 0.76 (P less than 0.001) for the number of connective tissue cells. Based on regression analysis in relation to indexed heart weight, we calculated that a doubling of indexed heart weight was associated with an increase in mean myocyte volume by 65%, degree of polyploidization by 24%, multinucleation by 7%, number of myocytes by 20% and number of connective tissue cells by 141%. The volume percentage of myocytes decreased by 6% in favour of the connective tissue fraction. These changes in myocardial composition indicate that the term 'hypertrophy' inadequately describes the actual myocardial changes in response to pressure overload.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Vliegen HW,van der Laarse A,Cornelisse CJ,Eulderink Fdoi
10.1093/oxfordjournals.eurheartj.a059928subject
Has Abstractpub_date
1991-04-01 00:00:00pages
488-94issue
4eissn
0195-668Xissn
1522-9645journal_volume
12pub_type
杂志文章abstract::Simultaneous two-channel Holter monitoring, with a direct recording system, and maximal exercise testing with a 12-lead precordial electrocardiographic mapping system were performed in 50 patients with chest pain (41 with documented coronary artery disease, 9 without). The exploring Holter leads were placed to corresp...
journal_title:European heart journal
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更新日期:1995-11-01 00:00:00
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1993-11-01 00:00:00
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